CN102279542B - Developer containing device and image forming apparatus - Google Patents
Developer containing device and image forming apparatus Download PDFInfo
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- CN102279542B CN102279542B CN201110159848.5A CN201110159848A CN102279542B CN 102279542 B CN102279542 B CN 102279542B CN 201110159848 A CN201110159848 A CN 201110159848A CN 102279542 B CN102279542 B CN 102279542B
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- groove
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- developer
- rotation axis
- dividing plate
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
- G03G21/1642—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements for connecting the different parts of the apparatus
- G03G21/1647—Mechanical connection means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0808—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer supplying means, e.g. structure of developer supply roller
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/20—Humidity or temperature control also ozone evacuation; Internal apparatus environment control
- G03G21/206—Conducting air through the machine, e.g. for cooling, filtering, removing gases like ozone
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
- Electrophotography Configuration And Component (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
A developer containing device (4A) for containing a developer includes a partition (13S) arranged between an outer space (13B) and an inner space (13A) for containing the developer, a bearing (19) arranged on the partition (13S), a rotation shaft (14) carried by the bearing (19) and extending from the outer space (13B) to the inner space (13A), a sealing member (18) arranged on the inner space (13A) side, having one end side (18a, 18c) fixed to the partition (13S) and the other end side (18b, 18d) being in contact with a surface of the rotation shaft (14), and thereby isolating the bearing (19) from the inner space (13A), a communication groove (21) arranged at the surface of the rotation shaft (14), and connecting the outer space (13B) to a closed space (20) isolated from the inner space (13A) by the sealing member (18), and a communication passage (13h) arranged on the partition (13S) for connecting the outer space (13B) to the closed space (20).
Description
The cross reference of related application
The Japanese patent application No.2010-134218 that the application submitted to take on June 11st, 2010 to Japan Office is basis, and its full content is incorporated in the application with way of reference.
Technical field
The present invention relates to a kind of developer containing device and a kind of image forming apparatus with this developer containing device using in the image formation step for form image by xerography.Image forming apparatus can comprise for example monochrome of pen recorder and display device or color copy machine, facsimile recorder and other.
Background technology
Electrophotographic image-forming apparatus comprises charging device, image exposing apparatus, developing apparatus, transfer device, cleaning device and fixing device, this charging device is for making to charge equably corresponding to the image-carrier of image forming course, this image exposing apparatus for forming electrostatic latent image by electric charge on the surface of image-carrier, this developing apparatus is for manifesting electrostatic latent image with developer, this transfer device is for being transferred to recording medium (paper etc.) with mechanical mode by the capable of appearing picture on image-carrier with electricity, this cleaning device is for removing the developer (toner etc.) remaining in after the transfer operation of transfer device on image-carrier, this fixing device is for being for good and all fixed on recording member by heat and pressure by the developer manifesting.
In the image forming apparatus with said structure, process unit is formed by image-carrier, charging device, exposure device, developing apparatus, transfer device and cleaning device.Conventionally, image forming apparatus is used the process unit that is formed with therein image-carrier, charging device, cleaning device and transfer device, although the image forming apparatus of some type is not used this unit.
In recent years, along with meeting the extensively universal of this equipment of said process, image forming apparatus that especially its principal character is full-color output, require to make the size reduction of image forming apparatus and print speed is improved, and required to realize long service life, reliability is high, picture quality is high and cost is low image forming apparatus.
For example, developing apparatus is provided with the developer containing device of receiving photographic developer.In order to prevent that developer is to external leakage, developer containing device has containment member (sealing member etc.), sealing member is arranged on the part (for example,, at the rotation axis for delivery of developer and for the space between the bearing unit of this axle) that forms a space.
In image forming apparatus, improved the transporting velocity of recording member to meet the requirement that improves print speed, and this produces a large amount of heat in bearing unit.The heat melts that developer is produced in bearing unit, thereby make such as subsequently such developer photographic fixing to the situation containment member will being caused to insufficient sealing of sealing member, and developer photographic fixing to bearing unit by the problem causing such as the rotation fault of rotation axis.Japanese laid-open patent open No.2005-140968, No.2000-019919 and No.2003-057927 (being respectively document 1,2 and 3) have pointed out and due to such fault, on recording medium, have formed defective image-related problem, and having proposed various suggestions to overcome such problem.
Document 1 discloses a kind of developing apparatus and a kind of image forming apparatus.In this developing apparatus, the rotation axis of carrying for developer has hollow structure, and fluid is supplied in rotation axis so that cooling bearing unit, thereby suppresses the generation of heat in bearing unit.
But this structure need to be used for supplying the fluid to the pump of developer conveying axis and the heat exchanger for fluid in addition.This may make the size of developing apparatus increase and cost increases.In addition, the heat being produced by bearing unit is passed to fluid by rotation axis, thereby can before fluid, heat developer so that its fusing at thermal release.
Summary of the invention
The present invention has made to overcome the problems referred to above, and developer containing device and the image forming apparatus that can effectively suppress the heat generation in bearing unit and do not make the size of equipment increase are provided.
In based on developing apparatus of the present invention, for the developer containing device of receiving photographic developer, comprise: dividing plate, this dividing plate is at space outerpace and for holding between the inner space of this developer; Bearing, this bearing is arranged on dividing plate; Rotation axis, this rotation axis extends to inner space by loading ability of bearing and from space outerpace; Containment member, sealing member is arranged on inner space side, so that by the sidepiece of an end of containment member being fixed to the sidepiece of dividing plate and the sidepiece of another end being remained with the Surface Contact of rotation axis bearing and inner space isolation; Communication groove, this communication groove is arranged on the surface of rotation axis so that by space outerpace with by the enclosure space of containment member and inner space isolation, be connected; And communication paths, this communication paths is arranged in dividing plate to space outerpace is connected with enclosure space.
Communication groove has such groove configuration: according to the rotation of rotation axis, on the surface of communication groove, cause air stream in axial direction.
In another aspect of the present invention, communication groove tilts with respect to the axial direction of rotation axis.
In another aspect of the present invention, communication groove has the first groove and the second groove that are positioned at the axle surface relative with bearing, the first groove and the second groove tilt with respect to axial direction, and the corresponding vergence direction of the first groove and the second groove is with respect to line symmetry in axial direction.
In another aspect of the present invention, dividing plate is the outer wall of developer containing device.
In another aspect of the present invention, rotation axis is the conveying screw rod axle that is provided with the developer conveyor screw of developer containing device.
Image forming apparatus according to the present invention has in above-mentioned developer containing device.
According to the detailed description below in conjunction with accompanying drawing of the present invention, foregoing and other object of the present invention, feature, aspect and advantage will become more apparent.
Accompanying drawing explanation
Fig. 1 illustrates to use according to the longitdinal cross-section diagram of the inner structure of the image forming apparatus of the developer containing device of embodiment.
Fig. 2 illustrates to use according to the stereographic map of the external structure of the developing apparatus of the developer containing device of embodiment.
Fig. 3 A illustrates that use is according to the vertical view of the inner structure of the developing apparatus of the developer containing device of embodiment, and Fig. 3 B illustrates to use according to the side view of the inner structure of the developing apparatus of the developer containing device of embodiment.
Fig. 4 illustrates and is arranged on the partial section in the region of the containment member on dividing plate holding in embodiment by magnification ratio.
Fig. 5 is the sectional view intercepting along the line V-V in Fig. 4.
Fig. 6 is the partial perspective view that the structure that is arranged on the communication groove on rotation axis in embodiment is shown by magnification ratio.
Fig. 7 is the schematic sectional view that the air stream being caused by the communication groove shown in Fig. 6 is shown.
Fig. 8 is the partial perspective view that another structure that is arranged on the communication groove on rotation axis in embodiment is shown by magnification ratio.
Fig. 9 is the schematic sectional view that the air stream being caused by the communication groove shown in Fig. 8 is shown.
Figure 10 illustrates the partial section that holds the region that is arranged on the containment member on dividing plate in the embodiment of another kind of form by magnification ratio.
Figure 11 illustrates the stereographic map that uses the outward appearance of the developing apparatus of developer containing device in actual example.
Figure 12 A illustrates the vertical view that uses the inner structure of the developing apparatus of developer containing device in actual example, and Figure 12 B illustrates the side view that uses the inner structure of the developing apparatus of developer containing device in actual example.
Figure 13 A and 13B are the stereographic maps that the configuration of the communication groove in actual example is shown.
Figure 14 illustrates and is arranged on the partial section in the region of the containment member on dividing plate holding in actual example by magnification ratio.
Figure 15 A and 15B are the stereographic maps that the communication groove of the another kind of configuration in actual example is shown.
Figure 16 is the schematic sectional view that the air stream being caused by the communication groove shown in Figure 15 A and 15B is shown.
Figure 17 is the stereographic map that the communication groove of another configuration in actual example is shown.
Figure 18 is the stereographic map that the communication groove of another configuration in actual example is shown.
Embodiment
Describe below with reference to accompanying drawings according to the embodiment of the present invention and developer containing device and the image forming apparatus of actual example.In the following description of embodiment and actual example, except as otherwise noted, otherwise numeral of part, quantity etc. do not limit the scope of the invention.Identical or corresponding parts are with identical Reference numeral, and can not repeat its description.
As the example of image forming apparatus, the image forming apparatus to using common full-color electrophotographic system 1000 is carried out to following description.But the present invention is not restricted to full-color electrophotographic system, but can be applied to use and only can form the image forming apparatus of (for example, black) image formation unit of the single kind of monochrome image.
(image forming apparatus 1000)
Referring to figs. 1 through 5, by being described according to the image forming apparatus 1000 of embodiment and developing apparatus 4.
First with reference to Fig. 1, according to the image forming apparatus 1000 of embodiment, use the full-color electrophotographic system of general type.Image forming apparatus 1000 comprises four kinds of image formation units 100, and these four kinds of image formation units 100 are corresponding with corresponding color (yellow, magneta colour, cyan and black) and be arranged on precalculated position respectively.
Each image formation unit 100 has image-carrier 1, charging device 2, image exposing apparatus 3, developing apparatus 4, transfer belt 5, main transfer device 6, secondary transfer device 7 and fixing device 8 and cleaning device 9 and goes charge devices 12.Image-carrier 1 is called as " photoreceptor ".Charging device 2 for the surface uniform to image-carrier 1 charge to provide electromotive force.Image exposing apparatus 3 is for utilizing emitted light, to form predetermined electrostatic latent image with respect to the charged electric potential of the aspiration level obtaining by charging device 2.Developing apparatus 4 is for to be attached to developer with the mode on the region of electrostatic latent image and to form mirror image by electric field etc.Cleaning device 9 and go charge devices 12 for removing from image-carrier 1 residual powder remaining in image-carrier 1 in mode electricity or machinery.
In main transfer device 6, electric field and voltage move to the transfer belt 5 that is called as " intermediate transfer member " powder that forms mirror image continuously from image-carrier 1.In secondary transfer device 7, electric field and voltage make powder move to the recording medium 11 such as paper from transfer belt 5.In fixing device 8, heat and pressure make to move to for good and all photographic fixing of powder on recording medium 11 to recording medium 11.
But in some cases, main transfer device 6 does not make powder move to transfer belt 5 completely, and has micro-powder to remain on image-carrier 1.In these cases, use cleaning device 9 and go charge devices 12, thereby from image-carrier 1, removing residual powder in mode electricity and/or machinery.
In some cases, secondary transfer device 7 does not make the powder that forms mirror image remove completely from transfer belt 5, and has micro-powder to remain in transfer belt 5.In these cases, with cleaning device 10, in mode electricity and/or machinery, remove powder.
Developer refers to the powder of being made by toner or comprises toner and the powder of carrier.Therefore,, when use does not comprise the monocomponent toner of carrier, developer is the powder that does not comprise carrier.When two-component developing agent that use comprises toner and carrier, developer is the powder of being made by toner or the powder of being made by toner and carrier.
The toner of be contained in monocomponent toner or two-component developing agent in developing apparatus 4, be supplied to the toner of developing apparatus 4, being collected by cleaning device 9, from cleaning device 9, be back to developing apparatus 4 so that the toner of reusing etc. are the concrete examples that is used in the developer image forming apparatus 1000.
(structure of developing apparatus 4)
The structure of developing apparatus 4 is described with reference to Fig. 2,3A and 3B.Developing apparatus 4 comprises case shape accomodating unit 13, conveying screw rod axle 14, developer, developer roll 15, confinement plate 30, multiple gear 16 and containment member 18.Case shape accomodating unit 13 is for receiving photographic developer.Conveying screw rod axle 14 is contained in the developer in accomodating unit 13 as rotation axis to carry in the direction representing with the arrow in Fig. 3 A and 3B and circulate.Developer roll 15 for forming mirror image by developer on image-carrier 1.Confinement plate 30 is restricted to scheduled volume by the amount of the lip-deep developer of developer roll 15.Multiple gears 16 are for being passed to conveying screw rod axle 14 and developer roll 15 from the rotating drive power that is arranged on outside motor etc.Containment member 18 for prevent developer from accomodating unit 13 to external leakage.
Two conveying screw rod axles 14 are parallel to each other.Each conveying screw rod axle 14 is provided with spiral 14S on its outer surface, and the developer throughput direction of spiral 14S is contrary with the developer throughput direction of the spiral 14S on another conveying screw rod axle 14.Each conveying screw rod axle 14 and developer roll 15 are linked together via gear 16 to rotate in the mode of interlocking.
(developer containing device 4A)
Accomodating unit 13, conveying screw rod axle 14 and packoff 18 in developing apparatus 4 will be called as " developer containing device 4A ", describe the concrete structure of developer containing device 4A with reference to Fig. 4 to 9.In addition, below by one that describes in two conveying screw rod axles 14.
With reference to Fig. 4, the accomodating unit 13 of case shape configuration has the dividing plate 13S between the 13A of the inner space of space outerpace 13B and receiving photographic developer.Dividing plate 13S is provided with bearing 19.Bearing 19 carries sidepiece or the part of an end of conveying screw rod axle 14, and conveying screw rod axle 14 is to extend to the rotation axis the 13A of inner space from space outerpace 13B.The part of a described end of conveying screw rod axle 14 is given prominence to and is reached in space outerpace 13B through dividing plate 13S.
In the 13A of inner space, the cylindrical shape containment member 18 with conical external surface is arranged to cover an end sections of conveying screw rod axle 14.Containment member 18 is made by rubber, elastomer resin etc.The larger-diameter end sidepiece 18a that has of containment member 18 is fixed to dividing plate 13S, and has the surface that another end sidepiece 18B of small diameter presses conveying screw rod axle 14.This makes bearing 19 and inner space 13A isolation, thereby in the 13A of inner space, forms the axle sealing structure that limits enclosure space 20.This axle sealing structure stops developer to leak into space outerpace 13B from inner space 13A.
On another end sidepiece (not shown) of conveying screw rod axle 14, gear 16 is not set, but uses similar axle sealing structure.Containment member 18 is arranged in the 13A of inner space, thereby makes bearing 19 and inner space 13A isolation, and enclosure space 20 is formed in the 13A of inner space.On another end sidepiece of conveying screw rod axle 14, dividing plate 13S forms the outer wall of accomodating unit 13, that is, and and the outer wall of developer containing device 4A.
With reference to Figure 4 and 5, the part that conveying screw rod axle 14 is supported by bearing 19 is provided with the communication groove 21 for space outerpace 13B is connected with enclosure space 20 in its surface.Because communication groove 21 is connected space outerpace 13B with enclosure space 20, so the length (W2) of communication groove 21 on the cross section that comprises axis is longer than the width of dividing plate 13S (W1), and reaches so a kind of state: communication groove 21 is held dividing plate 13S.
In this embodiment, conveying screw rod axle 14 is provided with communication groove 21 at two of its surface along the relative part place of diameter respectively.To the concrete configuration of communication groove 21 be described after a while.The quantity of communication groove 21 is not restricted to two, and can only a position, communication groove 21 is set or in three or more positions, communication groove 21 is set.
Dividing plate 13S is provided with the communication paths 23 that space outerpace 13B is connected with enclosure space 20.In this embodiment, dividing plate 13S is provided with communication paths 23, and communication paths 23 lays respectively at along four positions that circumferentially each interval 90 is spent.Each communication paths 23 has arc configuration.The quantity of communication paths 23 is not restricted to four, and can only a position, communication paths 23 is set or in three or more positions, communication paths 23 is set.
(configuration of communication groove 21)
With reference to the configuration of Fig. 6 to 9 pair of communication groove 21 and the Air Flow effect of communication groove 21 and communication paths 23, be described.
First with reference to Fig. 6 and 7, communication groove 21 shown in Fig. 6 has the unlifted wall 21a that is positioned at upstream (afterwards) side with respect to the rotation direction R of conveying screw rod axle 14, and have lower surface 21b, this lower surface 21b is along with the position from approaching space outerpace 13B side is moved towards the position of inner space 13A and reduces depth of groove.According to this groove configuration, when in rotational direction R rotation of conveying screw rod axle 14, on the surface of communication groove 21, produce from space outerpace 13B towards the inner space 13A air stream that in axial direction (A) points to.
Therefore, as shown in Figure 7, when conveying screw rod axle 14 rotates, the Air Flow that is arranged in space outerpace 13B side enters enclosure space 20 through communication groove 21.Because enclosure space 20 enters pressurized state, so the Air Flow in enclosure space 20 flows in space outerpace 13B through communication paths 23.
The Air Flow effect having with reference to Fig. 8 and 9 pairs between communication groove 21 and communication groove 21 and the communication paths 23 of another kind of configuration is described.Communication groove 21 shown in Fig. 8 has the unlifted wall 21a that is positioned at upstream (afterwards) side with respect to the rotation direction R of conveying screw rod axle 14, and have lower surface 21c, this lower surface 21c is along with the position from inner space 13A is moved towards the position of space outerpace 13B and reduces depth of groove.According to this groove configuration, when in rotational direction R rotation of conveying screw rod axle 14, on the surface of communication groove 21, produce from inner space 13A towards the space outerpace 13B air stream that in axial direction (A) points to.
Therefore, as shown in Figure 9, when conveying screw rod axle 14 rotates, the air that is positioned at inner space 13A side passes communication groove 21 from enclosure space 20 towards space outerpace 13B side flow.Because enclosure space 20 is in decompression state, air flows and enters enclosure space 20 through communication paths 23 from space outerpace 13B.
As shown in Fig. 7 and 9, by causing, from enclosure space 20, take air to outside flow, can be according to air the circulation in space outerpace 13B and by directly externally discharge of the heat producing between conveying screw rod axle 14 and bearing 19.Therefore, extraneous air can be directly applied to the bearing portion between conveying screw rod axle 14 and bearing 19, thereby make bearing portion can be able to effective cooling.
This can be avoided breaking down, for example, because being melted in that developer on bearing portion is attached to the seal failure of caused containment member on containment member and due to the rotation fault to caused conveying screw rod axle 14 on bearing portion by developer photographic fixing.
Because unmodified for the axle sealing structure of containment member 18 is set, and do not increase for cooling other apparatus structure, so the size of developer containing device 4A does not increase.Therefore, use the developing apparatus 4 of developer containing device 4A and use the size of the image forming apparatus 1000 of developing apparatus 4 not increase.
In addition, avoided seal failure in developer containing device 4A and the rotation fault of conveying screw rod axle 14, thereby avoided the image on recording medium 11 in image forming apparatus 1000 to form fault, this can improve the reliability of image forming apparatus 1000.
The groove configuration of communication groove 21 is not restricted to these groove configurations shown in Fig. 6 and 8.Can use any groove configuration, as long as the rotation of conveying screw rod axle 14 can cause in axial direction the air stream of (A) on the surface of communication groove 21.To other groove configuration be described after a while.
Described to use and there is the embodiment that the structure of cylindrical shape containment member 18 of conical external surface is relevant, but this structure not restrictive.For example, as shown in the sectional view of Figure 10, can there is the containment member 18A of loop configurations by use, its periphery 18c is fixed to dividing plate 13S and around conveying screw rod axle 14, perimeter surface 18d in it is set and carry out tectonic axis hermetically-sealed construction.Containment member 18A is made by rubber, elastomer resin etc.Figure 10 illustrates with magnification ratio the partial section that holds the region of the containment member 18A being arranged on dividing plate 13S in the embodiment of another kind of form.
(actual example)
The concrete actual example of developing apparatus 4 is described below with reference to Figure 11 to 14.
The part identical or corresponding with part in developing apparatus 4 in aforementioned embodiments, with identical reference number, do not repeat its description.Basic structure is identical with the basic structure of the axle sealing structure shown in Figure 10.
As shown in Figure 13 A and 13B, conveying screw rod axle 14 is provided with two communication groove 21 at the part place of one end thereof.Communication groove 21 in this actual example has identical groove configuration, and each groove part with respect to the axial direction (A) of conveying screw rod axle 14 be tilted to the left about 15 degree.
Therefore, as shown in figure 14, when conveying screw rod axle 14 rotates, air flows towards enclosure space 20 through communication groove 21 from space outerpace side.Because enclosure space 20 reaches pressurized state, so the Air Flow in enclosure space 20 flows to space outerpace 13B through communication paths 23.
When the velocity of rotation of conveying screw rod axle 14 is 600rpm (along the rotation direction R in Figure 13 A and 13B), measure to obtain the temperature in the enclosure space 20 of the conventional structure without communication groove 21 and communication paths 23 and there is communication groove 21 and the enclosure space 20 of the structure of this actual example of communication paths 23 in temperature.J type thermopair is for measuring the temperature of enclosure space 20.Result is as follows: the temperature rise in the enclosure space 20 of conventional structure is about 35.0 degree, and temperature rise in the enclosure space 20 of this actual example is about 25.0 degree.
As mentioned above, produce air-flow so that air externally flows from enclosure space 20.As mentioned above, can the heat producing between conveying screw rod axle 14 and bearing 19 directly externally be discharged by making the air circulation in space outerpace.Therefore, extraneous air can directly apply to the bearing portion between conveying screw rod axle 14 and bearing 19, and cooling bearing portion effectively.
Therefore, can avoid breaking down, for example, because developer melt is in bearing portion and such developer adheres to the seal failure of the caused containment member of containment member subsequently and because developer photographic fixing is to the rotation fault of the caused conveying screw rod axle 14 of bearing portion.
Two communication groove 21 in this actual example have identical groove configuration, and with respect to the axial direction (A) of conveying screw rod axle 14 along identical direction about 15 degree that tilt.But communication groove 21 can have the groove configuration shown in Figure 15 A and 15B.These communication groove 21 tilt with respect to axial direction (A), and especially, with respect in axial direction, the line of (A) tilts symmetrically.
When example is used this structure in the axial seal structure of embodiment as shown in Figure 4, conveying screw rod axle 14 rotates as shown in figure 16, air in one in communication groove 21 in its surface from space outerpace side towards inner space side in axial direction (A) flow, the air in another communication groove 21 in its surface from inner space side towards space outerpace side in axial direction (A) flow.Therefore, can make the air stream disturbance in enclosure space 20, thereby expect to improve the cooling effect in enclosure space 20.
Can use the communication groove with helical configuration 21 as shown in figure 17 or the communication groove with linear configuration in axial direction 21 to be as shown in figure 18 used as being different from the groove structure of above-described conveying screw rod axle 14.
Although the present invention be have been described in detail and illustrated, but can be expressly understood, the description of this invention and explanation are only to illustrate that the mode of carrying out with the mode of example and be not considered as limiting carries out, and scope of the present invention is explained by the term of claims.
Claims (12)
1. for a developer containing device for receiving photographic developer, comprising:
Dividing plate, described dividing plate is at space outerpace and for holding between the inner space of described developer;
Bearing, described bearing is arranged on described dividing plate;
Rotation axis, described rotation axis extends to described inner space by described loading ability of bearing and from described space outerpace;
Containment member, described containment member is arranged on described inner space side, so that by the sidepiece of an end of described containment member being fixed to the sidepiece of described dividing plate and the sidepiece of another end being remained with the Surface Contact of described rotation axis described bearing and the isolation of described inner space;
Communication groove, described communication groove is arranged on the surface of described rotation axis so that by described space outerpace with by described containment member, be connected with the enclosure space of described inner space isolation; And
Communication paths, described communication paths is arranged in described dividing plate, to described space outerpace is connected with described enclosure space,
Wherein, described communication groove and described communication paths form the air circulation structure that air stream is circulated between described space outerpace and described enclosure space.
2. developer containing device according to claim 1, wherein,
Described communication groove has such groove configuration: according to the rotation of described rotation axis, cause air stream in axial direction on the surface of described communication groove.
3. developer containing device according to claim 2, wherein,
Described communication groove tilts with respect to the axial direction of described rotation axis.
4. developer containing device according to claim 3, wherein,
Described communication groove has the first groove and the second groove that are positioned at the axle surface relative with described bearing,
Described the first groove and described the second groove tilt with respect to described axial direction, and
The corresponding vergence direction of described the first groove and described the second groove is with respect to the line symmetry along described axial direction.
5. according to the developer containing device described in any one in claim 1 to 4, wherein,
Described dividing plate is the outer wall of described developer containing device.
6. according to the developer containing device described in any one in claim 1 to 4, wherein,
Described rotation axis is conveying screw rod axle, and described conveying screw rod axle is provided with the developer conveyor screw of described developer containing device.
7. an image forming apparatus, comprises the developer containing device for receiving photographic developer, wherein,
Described developer containing device comprises:
Dividing plate, described dividing plate is at space outerpace and for holding between the inner space of described developer;
Bearing, described bearing is arranged on described dividing plate;
Rotation axis, described rotation axis extends to described inner space by described loading ability of bearing and from described space outerpace;
Containment member, described containment member is arranged on described inner space side, so that by the sidepiece of an end of described containment member being fixed to the sidepiece of described dividing plate and the sidepiece of another end being remained with the Surface Contact of described rotation axis described bearing and the isolation of described inner space;
Communication groove, described communication groove is arranged on the surface of described rotation axis so that by described space outerpace with by described containment member, be connected with the enclosure space of described inner space isolation; And
Communication paths, described communication paths is arranged in described dividing plate, to described space outerpace is connected with described enclosure space,
Wherein, described communication groove and described communication paths form the air circulation structure that air stream is circulated between described space outerpace and described enclosure space.
8. image forming apparatus according to claim 7, wherein,
Described communication groove has such groove configuration: according to the rotation of described rotation axis, cause air stream in axial direction on the surface of described communication groove.
9. image forming apparatus according to claim 8, wherein,
Described communication groove tilts with respect to the axial direction of described rotation axis.
10. image forming apparatus according to claim 9, wherein,
Described communication groove has the first groove and the second groove that are positioned at the axle surface relative with described bearing,
Described the first groove and described the second groove tilt with respect to described axial direction, and
The corresponding vergence direction of described the first groove and described the second groove is with respect to the line symmetry along described axial direction.
11. according to the image forming apparatus described in any one in claim 7 to 10, wherein,
Described dividing plate is the outer wall of described developer containing device.
12. according to the image forming apparatus described in any one in claim 7 to 10, wherein,
Described rotation axis is conveying screw rod axle, and described conveying screw rod axle is provided with the developer conveyor screw of described developer containing device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-134218 | 2010-06-11 | ||
| JP2010134218A JP5062297B2 (en) | 2010-06-11 | 2010-06-11 | Developer storage device and image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102279542A CN102279542A (en) | 2011-12-14 |
| CN102279542B true CN102279542B (en) | 2014-04-23 |
Family
ID=44584708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110159848.5A Active CN102279542B (en) | 2010-06-11 | 2011-06-09 | Developer containing device and image forming apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8577246B2 (en) |
| EP (1) | EP2395400B1 (en) |
| JP (1) | JP5062297B2 (en) |
| CN (1) | CN102279542B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013068930A (en) * | 2011-09-05 | 2013-04-18 | Ricoh Co Ltd | Image forming device |
| JP6225560B2 (en) * | 2013-08-28 | 2017-11-08 | 株式会社リコー | Developing device and image forming apparatus |
| JP6488672B2 (en) * | 2014-03-18 | 2019-03-27 | 株式会社リコー | Rotating bearing cooling structure, developing device, image forming apparatus, and rotating bearing structure |
| WO2019142843A1 (en) * | 2018-01-17 | 2019-07-25 | Ntn株式会社 | Sliding bearing, bearing device, and image formation device |
| JP7332299B2 (en) * | 2018-01-17 | 2023-08-23 | Ntn株式会社 | Plain bearing, bearing device, and image forming device |
| US11656562B2 (en) * | 2021-05-20 | 2023-05-23 | Fujifilm Business Innovation Corp. | Developing device with transporting member and cooling unit fixed to a case |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5946530A (en) * | 1997-07-23 | 1999-08-31 | Sharp Kabushiki Kaisha | Developer processing apparatus provided with sealing member and sealing layer at rotary member supporting portion |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118674A (en) * | 1990-03-08 | 1992-04-20 | Canon Inc | Developer storing device |
| JPH06130791A (en) * | 1992-10-14 | 1994-05-13 | Ricoh Co Ltd | Bearing device |
| JPH09257048A (en) * | 1996-03-25 | 1997-09-30 | Ricoh Co Ltd | Cooling structure of driving device |
| JP2000019919A (en) | 1998-07-02 | 2000-01-21 | Canon Inc | Cleaning device and image forming device provided with same |
| JP2003057927A (en) | 2001-08-14 | 2003-02-28 | Canon Inc | Developing device, and process cartridge and image forming device equipped therewith |
| JP4247095B2 (en) | 2003-11-06 | 2009-04-02 | 株式会社リコー | Development device and image forming device |
| JP2005227351A (en) * | 2004-02-10 | 2005-08-25 | Canon Inc | Developer replenishment device and image forming apparatus |
| JP2007058023A (en) * | 2005-08-26 | 2007-03-08 | Ricoh Printing Systems Ltd | Developing device and electrophotographic device equipped with same |
| JP2007171865A (en) * | 2005-12-26 | 2007-07-05 | Fuji Xerox Co Ltd | Powder agitating device and image forming apparatus |
| JP4931469B2 (en) * | 2006-04-21 | 2012-05-16 | 株式会社リコー | Driving device and image forming apparatus |
| JP4964012B2 (en) * | 2007-04-18 | 2012-06-27 | 株式会社リコー | Driving device and image forming apparatus |
| KR101431166B1 (en) * | 2007-07-25 | 2014-08-19 | 삼성전자주식회사 | Developer cartridge and image forming apparatus having the same |
-
2010
- 2010-06-11 JP JP2010134218A patent/JP5062297B2/en active Active
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2011
- 2011-06-02 US US13/151,549 patent/US8577246B2/en active Active
- 2011-06-09 CN CN201110159848.5A patent/CN102279542B/en active Active
- 2011-06-10 EP EP11169484.0A patent/EP2395400B1/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5946530A (en) * | 1997-07-23 | 1999-08-31 | Sharp Kabushiki Kaisha | Developer processing apparatus provided with sealing member and sealing layer at rotary member supporting portion |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110305477A1 (en) | 2011-12-15 |
| JP5062297B2 (en) | 2012-10-31 |
| EP2395400B1 (en) | 2019-05-08 |
| CN102279542A (en) | 2011-12-14 |
| EP2395400A3 (en) | 2015-03-18 |
| EP2395400A2 (en) | 2011-12-14 |
| US8577246B2 (en) | 2013-11-05 |
| JP2011257703A (en) | 2011-12-22 |
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